Congratulate before you ask
When a new product is announced more often than not the first comment I read is someone asking for features which this new product does not have.
To illustrate; if your grandmother made you delicious, homemade chocolate chip cookies and you — looking grandma directly in the face — ask “What, no ice cream?”
Most recently I saw this Mozilla’s announcement post for Rec Room. Check out the first comment and how it reads “Now all we need is…”.
They released an application development framework for apps to run on Firefox OS. That is a lot of work. Congratulate them for making it to that milestone before you pour on with your feature requests.
If you see someone put in all the hard work it takes to put a product out in the world, applaud them. Save your requests for later.